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1.The shelterbelts project along the upper and middle reaches of the Yangtze River has yielded a total of more than 5.46 million hectares of newly planted forest in seven years.
长江中上游防护林体系工程7年累计营造林546万公顷;收藏指正
2.Experimental plots were established for thinning effects on stand and tree growth, tree species composition, species diversity and soil factors etc. in the mixed larch-spruce-fir stands which originated from planted larch pure forest by observations for 12 years after thinning.
摘要以15块人工落叶松纯林演化后形成的落叶松云冷杉混交林为对象,间伐后12年观测结果,研究间伐对林分和树木生长、树种组成、物种多样性及土壤等因子的影响。收藏指正
3.Study on the effects of primary planted density of young trees of the construction timber forest of China fir
杉木建材林初植密度幼龄期效应的研究收藏指正
4.20-metre forest belt combining arbor with bush can reduce 5.4 dB noise when such forest belt is planted on the leaning slope beside highway. The width of forest belt is direct proportion to the effect on noise reduction.
乔灌木结合的20m绿化防护带种植在高速公路内低外高的弧形曲面上减噪效果最高可达5.4dB,绿化防护林带宽度与减噪效果呈显著正相关。收藏指正
5.From the early 1960s to the present, the region has planted 70 million trees and hillsides closed off for forest conservation reached 140,000 hectares a year.
六十年代初至今,全区植树7000多万株,每年封山育林约14万公顷。收藏指正
6.Trees were planted in the vicinity of Lhasa, and in important agricultural areas forest shelter belts were built around the fields to reduce soil erosion by sand.
在拉萨周边地区实施造林绿化工程,在重要农业区推广农田林网化,降低风沙对土壤的侵蚀。收藏指正
7.In 28 counties along the upper reaches of the Jinsha, Lancang and Nujiang rivers and the catchment area of the Yarlungzangbo River, where the hazards of sandstorm and soil erosion are serious, a project to restore farmland to forest is being undertaken, under which 52,000 ha of cultivated land will be restored to forest and trees planted on 53,000 ha of barren mountains and wasteland. By 2002, some 6,700 ha of cultivated land had been restored to forest and 6,700 ha of barren mountains and wasteland afforested.
在风沙危害和水土流失严重的金沙江、澜沧江、怒江上游及雅鲁藏布江流域的28个县实施退耕还林工程,规划退耕地造林5.2万公顷,宜林荒山荒地造林5.3万公顷,2002年已实施退耕地造林0.67万公顷,宜林荒山荒地造林0.67万公顷。收藏指正
8.A simple systemic thinning technology adequate for the mixed forest of planted Pinus koraiensis and broadleaf trees in Liaodong region were carried, conducting the forestry management and production.
通过本项研究,制定出的一套适合该地区红松阔叶混交林较为直观、简便的抚育间伐技术,以指导林业生产。收藏指正
9.Control of the five sands hazard sources along the three rivers and two sandy area (namely, the Yongding River, the Chaobai River, the Dasha River and at Kangzhuang in Yanqing County and Nankou in Changping), will be facilitated. By 2005, over 10,000 hectares’ forest to defend wind and retain sand will be planted.
加快"三河两滩"五大风沙危害区(永定河、潮白河、大沙河、延庆康庄、昌平南口)的治理,到2005年完成防风固沙片林1万公顷;收藏指正
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